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  1. Preface
  2. The Transformation Language
  3. Constants
  4. Operators
  5. Variables
  6. Dates
  7. Functions
  8. Creating Custom Functions
  9. Custom Function API Reference

Transformation Language Reference

Transformation Language Reference

Local Variables

Local Variables

If you use local variables in a mapping, use them in any transformation expression in the mapping. For example, if you use a complex tax calculation throughout a mapping, you might want to write the expression once and designate it as a variable. This increases performance since the
PowerCenter Integration Service
performs the calculation only once.
Local variables are useful when used with stored procedure expressions to capture multiple return values.